<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="str.name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="str.age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="str.sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="btn">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0" v-if="arr.length > 0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="shan(index)">删除</button>
            <button @click="bian(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      str: {
        name: "",
        age: "",
        sex: "",
      },
      kon: "null",
      arr: [
        {
          name: "tom",
          age: "19",
          sex: "男",
        },
        {
          name: "jone",
          age: "21",
          sex: "女",
        },
      ],
    };
  },
  methods: {
    btn() {
      // 浅拷贝   脱离引用关系
      let obj = { ...this.str };
      if (this.kon !== null) {
        this.$set(this.arr, this.kon, obj);
        this.kon = null;
      } else {
        this.arr.push(obj);
      }
    },
    shan(ind) {
      this.arr.splice(ind, 1);
    },
    bian(ind) {
      let o = this.arr[ind]; //获取的内容
      this.str = { ...o };
      this.kon = ind;
    },
  },
};
</script>
